Confirmation of the list came as it emerged the Government has ordered an inquiry into leaks from draft Ofsted reports that indicated six of the schools will be placed under special measures after inspectors discovered “extensive flaws in leadership and management”.

Three of the six – Park View, Golden Hillock and Nansen – are academies and part of the Park View Educational Trust. They are supposedly non-faith schools but Ofsted reportedly found that lessons and school activities were based on militant Islamist principles.

Park View School was found to have practiced forced and discriminatory gender segregation in classrooms, according to the leaked reports. It is claimed that extremist preacher Sheikh Shady al-Suleiman was invited to address students at the school.

At Park View and Golden Hillock, the curriculum had been “Islamised” with GCSE subjects restricted to comply with conservative Islamic teaching, it is claimed.

The six schools could have their governing bodies removed by the Department for Education and teachers replaced.

A further nine schools are likely to be graded as “requiring improvement” in leadership and management, the second lowest rank, and given enhanced monitoring and support.

At a media briefing given by Birmingham City Council leader Sir Albert Bore, the following Trojan Horse developments were confirmed:

– The council will operate a telephone hot-line and dedicated email and postal address from Monday where anyone with information about the alleged infiltration of classrooms by Islamic militants can give information.
– Ofsted chief executive Sir Michael Wilshaw is expected to publish results of inspections at the 18 schools under investigation early in May.
– An attempt by Birmingham council to have a single inquiry into the affair was rebuffed by Education Secretary Michael Gove, who appointed former Metropolitan Police counter-terrorism expert Peter Clarke to investigate Trojan Horse.

Sir Albert described a Sunday Telegraph report based on leaked Ofsted reports into the Park View Educational Trust as “reprehensible and completely unacceptable”. He said the government had confirmed a leaks inquiry by the Cabinet Office is underway.

He stressed that Ofsted’s findings are in draft form and could be changed following comments from the schools involved. However, Sir Albert accepted that draft reports are rarely changed significantly in practice.

He revealed that the council is yet to see any of the draft Ofsted reports, amid growing signs of frustration at the scale of inquiries already underway into Trojan Horse.

The council has set up its own investigation through a review group chaired by former head teacher Ian Kershaw. In addition, Peter Clarke will conduct a separate inquiry for the Secretary of State. A single Ofsted report into the 18 schools constitutes the third inquiry.

The possibility of the three inquiries reaching different conclusions is beginning to concern council leaders. “We are still trying to engage with the Department for Education and Ofsted. It is very important there should be a joined up approach,” Sir Albert admitted.

Sir Albert defended the appointment to the review group of a head teacher at one of the schools under investigation. Kamal Hanif, from Waverley primary, was a respected figure from the Muslim community who would look at matters with an open mind.

The council leader said he would continue to make the case to Mr Gove for a single inquiry under Mr Kershaw and Mr Clarke, but accepted this was unlikely.

Sir Albert accepted that specific allegations, including claims of extremist preachers taking part in school assemblies, would be easily investigated and he expected the council probe to discover exactly what had happened.